American Standard 80 Furnace Installation Manual

The American Standard 80 Furnace is a high-efficiency gas furnace designed for residential heating applications. This model features 80% AFUE efficiency, single-stage operation, durable heat exchanger construction, multi-speed blower motor, electronic ignition system, and compatibility with various thermostat systems. The furnace is designed for easy installation in upflow, downflow, or horizontal configurations. Below are key sections for safety, installation procedures, electrical connections, startup procedures, and maintenance guidelines.

Features at a Glance

Key components: Durable aluminized steel heat exchanger, multi-speed direct drive blower, hot surface ignitor, flame sensor, pressure switches, and integrated control board.

Safety Precautions

Read all instructions before beginning installation. Follow local codes and manufacturer guidelines.

1. Turn off electrical power and gas supply before installation.
2. Wear appropriate personal protective equipment (PPE).
3. Ensure proper clearance from combustible materials.
4. Verify adequate combustion air and proper venting.
5. Check for gas leaks using soap solution after connections.

WARNING! Failure to follow safety procedures may result in fire, explosion, personal injury, or death. Gas furnaces must be installed by qualified technicians only.

Pre-Installation Requirements

Verify site conditions and gather necessary tools before beginning installation.

1. Check local building codes and obtain required permits.
2. Ensure adequate space for service access (minimum 24 inches front clearance).
3. Verify proper gas line size and pressure requirements.
4. Check electrical service requirements (115V, 60Hz).
5. Confirm proper venting materials and routing.
6. Ensure condensate drain line can be properly routed.

CAUTION! Furnace is heavy; use proper lifting techniques and equipment.

Technical Specifications

• AFUE Rating: 80%
• Input BTU/H: 40,000 - 120,000 (varies by model)
• Output BTU/H: 32,000 - 96,000 (varies by model)
• Gas Type: Natural Gas (convertible to LP with kit)
• Gas Pressure: 3.5" WC natural gas, 10" WC propane
• Electrical: 115V, 60Hz, 1.5 Amps
• Blower Motor: Multi-speed PSC
• Static Pressure: 0.1" to 0.5" WC
• Venting: Category I, PVC or metal
• Dimensions: Varies by model (typical 21"W x 21"D x 40"H)

Installation Procedures

Follow these steps for proper furnace installation and positioning.

1. Position furnace: Place on level surface in desired orientation (upflow, downflow, horizontal).
2. Check clearances: Maintain minimum clearances to combustibles (1" sides, 1" rear, 6" front).
3. Secure furnace: Anchor to floor or platform as required by local codes.
4. Connect ductwork: Seal all connections with approved duct sealant.
5. Install filter: Ensure proper filter size and orientation.
6. Check level: Verify furnace is level in all directions.

Tip: Use manufacturer-suppired template for proper positioning and mounting.

Electrical Connections

All electrical work must comply with NEC and local codes. Use copper conductors only.

1. Disconnect power at main service panel before making connections.
2. Connect line voltage: 115V circuit with proper overcurrent protection.
3. Connect thermostat: Use 18-22 gauge low voltage wiring.
4. Ground furnace: Connect equipment grounding conductor to furnace chassis.
5. Verify polarity: Ensure proper hot and neutral connections.

WARNING! Electrical shock hazard. Always disconnect power before servicing.

Venting and Combustion Air

Proper venting is critical for safe operation and efficiency.

1. Vent materials: Use approved PVC, CPVC, or metal vent pipe.
2. Vent sizing: Follow manufacturer specifications for pipe diameter.
3. Vent length: Maximum vent run varies by furnace size and configuration.
4. Combustion air: Provide adequate fresh air supply per local codes.
5. Termination: Position vent termination away from windows and air intakes.
6. Slope: Ensure proper slope for condensate drainage.

CAUTION! Improper venting can cause carbon monoxide poisoning.

Startup and Commissioning

Follow this sequence for proper furnace startup and verification.

1. Verify all connections: Gas, electrical, venting, and ductwork.
2. Check gas pressure: Use manometer to verify inlet and manifold pressures.
3. Test for leaks: Use soap solution on all gas connections.
4. Start furnace: Restore power and initiate heating cycle.
5. Check operation: Verify proper ignition, flame, and blower operation.
6. Measure temperatures: Check temperature rise against specifications.
7. Adjust blower speed: Set for proper airflow and temperature rise.

WARNING! Never bypass safety controls during startup or testing.

Maintenance Guidelines

Regular maintenance ensures optimal performance and longevity.

• Monthly: Check and replace air filter as needed
• Annual: Professional inspection and cleaning
• Annual: Clean burners and heat exchanger
• Annual: Check and clean flame sensor
• Annual: Verify gas pressure and safety controls
• Annual: Lubricate blower motor if required
• Seasonal: Check condensate drain and trap

CAUTION! Only qualified technicians should perform internal maintenance.

Warranty Information

American Standard provides limited warranties for various components. Heat exchanger: 20-year limited warranty. Functional parts: 5-year limited warranty. Labor: 1-year limited warranty from date of installation. Registration required within 60 days of installation. For warranty claims, contact authorized American Standard dealers. Keep original sales receipt and installation documents.

Troubleshooting

Reset: Turn power off for 30 seconds, then restore to reset control board.

Service: Contact authorized American Standard dealer for professional service.